3a-alpha,4-beta,7-beta,7a-alpha-Tetrahydro-4,7-epoxybenzo(c)thiophene-1,3-dione 4,7-Epoxybenzo(c)thiophene-1,3-dione, 3a,4,7,7a-tetrahydro-, (3a-alpha,4-beta,7-beta,7a-alpha)- 64566-32-1 BRN 1372571